Scaffold hanger



Nov. 7, 1939. F. BOOMGARDEN SGAFFOLD HANGER Filed March 21, 1939 2 Sheets-Sheet 1 In vc n t o r P rederztk Baar a aran Attorneys Nov. 7, 1939. F. BOOMGARDEN 2,179,173

SCAFFOLD HANGER Filed March 21, 1939 2 Sheets-Sheet 2 F .5. w' I n v I l i I l 1 Inventor i ederz 52$ 500 rr arvi'en Attorneys Patented Nov. 7, 1939 ATENT OFFICE SCAFFOLD HANGER Frederick Boomgarden, German Valley, Ill.

Application March 21,

3 Claims.

This invention pertains to new and useful improvements in scaffold hangers to be used particularly by house painters and has for its primary object to provide, in a manner as hereinafter set forth, a device of this character comprising novel means through the medium of which a scaffold or the like may be conveniently suspended from the eaves of buildings.

Another important object of the invention is to provide, in a manner as hereinafter set forth, a scaffold hanger of the character described embodying a construction and arrangement which is such that the grip of the device on the building eave will be increased in proportion to the weight thereon.

Still another important object of the invention is to provide a scaffold hanger of the character set forth which is adapted to be used on different types of roofs and which will damage said roofs in no way.

Other objects of the invention are to provide a scaffold hanger of the aforementioned character which will be comparatively simple in construction, strong, durable, highly efiicient and reliable in use, compact and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will be readily apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a view in side elevation of a scaffold hanger constructed in accordance with the present invention, showing the device in use.

Figure 2 is a view partially in side elevation and partially in vertical section through the device, taken substantially on the line 2-2 of Fig. 3.

Figure 3 is a view in front elevation of the hanger.

Figure 4 is a View in horizontal section, taken substantially on the line 44 of Fig. 2.

Figure5 is a view in vertical section through one of the jaws.

Figure 6 is a plan view of one of the jaws, showing the cover open.

Referring now to the drawings in detail, and to Figure 1 thereof in particular, it will be seen that the reference numeral'l designates a portion of a building having a shingled roof 2. One of the eaves of the roof 2 is indicated at 3. The embodiment of the present invention which has been illustrated comprises a hook 4 of any suitable metal having depending from one end thereof a 1939, Serial No. 263,279

shank in the form of an elongated housing 5 which is open at both ends.

Slidably mounted in the housing '5 and extending downwardly therefrom is a rack bar '5 which terminates, at its lower end, in an eye 1 for connecting a scaffold thereto, as at 8. Also slidably mounted in the housing 5 and extending upwardly therefrom is a rack bar 9 which is arranged in spaced, opposed relation to the rack bar 6. The rack bar 9 is operatively connected to the rack bar 6 through the medium of pinion gears Ill which are journaled in the housing 5.

On the upper end of the rack bar 9 is an integral head ll. Mounted for universal adjustment on the head I I is a jaw l2 which coacts with a substantiallysimilar jaw l3 on the free end of the hook l for clamping the eave 3 therebetween. As best seen in Figs. 5 and 6 of the drawings, each of the jaws l2 and I3 is provided on its face with a plurality of prongs M which are adapted to bite into the eave 3 of the roof 2. The prongs M are arranged to leave smooth marginal portions E5 on the jaws. I-Iingedly mounted on the jaws are metallic covers or shields it for the prongs l4 when the hanger is to be attached to other types of grooves and the use of said prongs is not desired. The covers 16 are substantially in the form of housings for enclosing the prongs I l 'and include marginal flanges ll which are engageable on the smooth marginal portions it of the jaw faces when said covers are in closed or operative position.

The upper jaw l3 has formed therein a socket It for the reception of a ball in on the upper end of the hook 4. This is clearly shown in Fig. 5 of the drawings. Referring to Figure 2 of the drawings, it will be observed that the ball and socket arrangement of the lower jaw i2 is reversed. That is, the ball is on the jaw l2 and the socket which receives the ball is in the head i l of the rack bar 9.

It is thought that the manner in which the device functions will be readily apparent from a consideration of the foregoing. Briefly, the coacting jaws l3 and 12 are engaged above and below the roof eave 3 in a manner to firmly clamp said eave therebetween. With the covers it in open position the prongs M of the jaws are adapted to bite into the eave. Of course, two or more of the hangers are to be used for supporting the scaffold. The weight of the scaffold pulls the rack bar 6 downwardly, thus forcing the rack bar 9 upwardly through the medium of the gears H). In this manner the hanger is securely clamped to the eave 3 and, as will be readily apparent,

the grip of the device increases as the weight suspended therefrom increases. When the hanger is to be mounted on certain other types of rods the covers l6 are swung to closed position over the prongs M of the jaws l2 and I3. This is shown in Fig. 5 of the drawings.

It is believed that the many advantages of a scafiold hanger constructed in accordance with the present invention will be readily understood and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall Within the scope of the invention as claimed.

What is claimed is:

1. A scaffold hanger comprising a hook, a jaw rockably mounted on one end of said hook, an elongated housing integral with the other end of the hook, a rack bar slidably mounted in the housing, a head on one end of said rack bar, a jaw rockably mounted on said head and opposed to the first named jaw, another rack bar slidably mounted in the housing and adapted for connection with a scaffold, and gears journalled in the housing and meshed with the rack bars and constituting means for moving the first named rack bar toward the first named jaw when the second named rack bar is moved in the opposite direction.

2. A scaffold hanger comprising a hook, and coacting jaws mounted on the ends of said hook, each jaw including a plurality of prongs on its face adapted to bite into a support, and a cover for said prongs hingedly mounted on the jaw.

3. A scaffold hanger comprising a hook, an elongated stationary housing, open at both ends, on one end of the hook, a jaw on the other end of the hook, a rack bar slidably mounted in the housing and projecting from one end thereof for coaction with the jaw, another rack bar slidably mounted in the housing and projecting from the other end thereof for connection with a load, and gears rotatably mounted in the housing and operatively connecting the first named rack bar to the second named rack bar for actuation thereby toward the jaw.

FREDERICK BOOMGARDEN. 

